A medium access control(MAC) protocol with effective spectral bandwidth distribution was proposed for the CDMA network carrying multi-service traffics.Based on the “BER limited” characteristics of the CDMA system
the protocol maps the diverse BER requirements of multimedia services into the effective spectral bandwidth.The ef-fective bandwidth was dynamically distributed to different services according to the traffic of the system.The simu-lation results show that the performance of the proposed system in terms of throughput is better than that of the exist-ing systems.